answersLogoWhite

0


Best Answer

It will work almost forever for the exact same flu viruses. However due to viruses' ability to mutate to new forms that would not be prevented by the injection you already had, you will need a new vaccine for the new mutated virus or other different flu viruses that the scientists have determined are likely to be the ones making people sick this year. Sometimes it is the same ones, but most often the strains of flu viruses do change each year and that is why a new shot is required before each new flu season and why each vaccination is for three different types of flu (called trivalent vaccines).

This year the 2011-2012 seasonal flu vaccine in the US contains vaccines for these three different flu viruses:

  1. A/California/7/2009 (H1N1)-like virus; (the pandemic Swine Flu)
  2. A/Perth/16/2009 (H3N2)-like virus; and
  3. B/Brisbane/60/2008-like virus.

* Note:

The pandemic swine flu vaccine was also in the 2010-2011 flu season vaccine formulation, but it does not hurt to have a second dose (or if you took it also in 2009-2010, it is still okay to get this year's vaccine and, it might help some people).

User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Does last year's flu shot still work?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

How long does tetnus injections last for?

You should get a tetanus shot every 10 years. If you work in an environment where you are more likely to get injured, you should get them every 5 years. If you get a wound that is deep or gets dirty then you should get a tetanus shot if it has been more than 5 years since your last one.


How long before Rocephin shot for UTI starts to work?

Had a shot of Rocephin for a UTI Tuesday evening. It is now Thursday evening. And, I am still waiting for it to work.


If you get the depo shot while your on your cycle but your cycle is abnormal dose it still work?

I would call the doctor to be sure. But as far as what I have heard, it does still work. A lot of people i know get weird cycles BECAUSE of the depo shot


If you get shot in the leg will your leg still work?

That would depend greatly on where you were shot. If shot in the leg, chances of survival are good but you always need to watch with certain nerves and arteries.


Does friends the tv show still film?

No. They filmed the last original episode years ago. Sometimes the original cast members work together, but, the series Friends ended years ago.


Is Abraham still alive?

Abraham Lincoln was assassinated in 1865, around 150 years ago. He was shot in the head, and he died the next day. However, due to his work towards the abolition of slavery and the signing of the Emancipation Proclamation, he still has a strong legacy today.No


How long did Jesus work last?

Jesus work on earth lasted three and a half years.


Does bigfatawesomehousepartycom still work?

No. It ended a few years ago


How work has changed over the last 100 years?

One way work has changed over the last 100 years is that many of the women and men both work outside of the home. Also some people just work so that they can have good insurance.


How work changed over the last 100 years?

One way work has changed over the last 100 years is that many of the women and men both work outside of the home. Also some people just work so that they can have good insurance.


Has the workplace changed over the last fifteen years?

ICT and work


Can you get your Depo Provera shot while on your period?

You are supposed to get the shot when you are on your period to make sure you aren't pregnant, but you still need your yearly exam and the doctors dont want you on your period for that.